16641629 has 4 divisors (see below), whose sum is σ = 16955676. Its totient is φ = 16327584.

The previous prime is 16641617. The next prime is 16641649. The reversal of 16641629 is 92614661.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12974404 + 3667225 = 3602^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 16641629 - 2¹⁶ = 16576093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16641649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156944 + ... + 157049.

It is an arithmetic number, because the mean of its divisors is an integer number (4238919).

Almost surely, 2^16641629 is an apocalyptic number.

It is an amenable number.

16641629 is a deficient number, since it is larger than the sum of its proper divisors (314047).

16641629 is an equidigital number, since it uses as much as digits as its factorization.

16641629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314046.

The product of its digits is 15552, while the sum is 35.

The square root of 16641629 is about 4079.4152767278. The cubic root of 16641629 is about 255.3085026918.

The spelling of 16641629 in words is "sixteen million, six hundred forty-one thousand, six hundred twenty-nine".